/*
 * TMap Designer - A Thematic Map design software
 * Copyright (C) 2006 World Health Organization
 * http://www.who.int
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package who.tmap.imp.impl;

import who.tmap.common.TMapException;
import who.tmap.common.TMapFactory;
import who.tmap.imp.ImportAdapter;
import who.tmap.imp.ImportAdapterException;
import who.tmap.imp.ImportAdapters;

/**
 * @author stl
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class ImportAdapterFactory implements TMapFactory, ImportAdapters {

    private static ImportAdapterFactory instance =null;
    
    /**
     * Private constructor because it is a singleton
     *
     */
    private ImportAdapterFactory() {
    }
    
    /**
     * Lazy instanciation of the factory instance
     * @return
     */
    public static synchronized ImportAdapterFactory getInstance() {
        if ( instance == null ) {
            instance =new ImportAdapterFactory();
        }
        
        return instance;
    }
    
    /**
     * Instanciates import adapters
     * @param import adapter type
     * @return
     * @throws ImportAdapterException
     * @throws TMapException
     */
    public ImportAdapter getImportAdapter( int importAdapterType ) throws ImportAdapterException {
        ImportAdapter adapter =null;
        
        switch( importAdapterType ) {
        	case CSV:
        	    adapter =new CSVImportAdapterImpl();
        	    break;
        	    
        	case EXCEL:
        	    adapter =new ExcelImportAdapterImpl();
        	    break;
        	    
        	case JDBC_ODBC:
        	    adapter =new ODBCDSNLessImportAdapterImpl();
        	    break;
        	    
        	default:
        	    throw new ImportAdapterException( "Invalid import adapter type: [" + importAdapterType + "]" );
        }
        
        return adapter;
    }

}
